Allow $-prefixed hexadecimal FP as an alternative to 0x
Since we allow the prefix $ instead of 0x for integer constants, do the same for floating point. No suffix support at this time; we may want to consider if that would be appropriate.
This commit is contained in:
H. Peter Anvin
parent
2d25ce4555
commit
449e04b330
3 changed files with 174 additions and 1 deletions
2
float.c
2
float.c
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@ -659,6 +659,8 @@ static int to_float(const char *str, int sign, uint8_t * result,
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} else {
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if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
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ok = ieee_flconvert_hex(str + 2, mant, &exponent);
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else if (str[0] == '$')
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ok = ieee_flconvert_hex(str + 1, mant, &exponent);
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else
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ok = ieee_flconvert(str, mant, &exponent);
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@ -140,7 +140,7 @@ int stdscan(void *private_data, struct tokenval *tv)
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}
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} else if (c == 'H' || c == 'h') {
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has_h = true;
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} else if (c == 'P' || c == 'p') {
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} else if (is_hex & (c == 'P' || c == 'p')) {
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is_float = true;
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if (*stdscan_bufptr == '+' || *stdscan_bufptr == '-')
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stdscan_bufptr++;
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171
test/floatx.asm
171
test/floatx.asm
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@ -176,3 +176,174 @@
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do 0x1.ffffffffffffffffffffffffffffffffp+16383 ; Rounds to infinity
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do Inf ; Infinity
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do NaN
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; 16-bit
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dw 1.0
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dw $1.0
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dw 2.0
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dw $2.0
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dw $1.0p+1
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dw $1.0p-1
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dw $0.0
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dw $1.23456789
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dw $0.123456789
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dw $0.0000123456789
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dw $1.23456789p10
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dw $1.23456789p+10
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dw $1.23456789p-10
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dw $0.123456789p10
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dw $0.123456789p+10
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dw $0.123456789abcdef0123456789abcdef012345p-10
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dw $0.0000123456789
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dw $0.0000123456789p+10
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dw $0.0000123456789p-10
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dw $1.0p-25 ; Underflow
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dw $1.0p-24 ; Smallest denorm
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dw $1.ffffffffffffffffffffffffffffp-16 ; Rounds to denorm
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dw $1.0p-15 ; Denorm
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dw $1.ffffffffffffffffffffffffffffp-15 ; Rounds to normal
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dw $1.0p-14 ; Smallest non-denorm
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dw $1.0p+15 ; Biggest possible exponent
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dw $1.ffffffffffffffffffffffffffffp+15 ; Rounds to infinity
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dw Inf ; Infinity
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dw NaN
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; 32-bit
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dd 1.0
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dd $1.0
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dd 2.0
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dd $2.0
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dd $1.0p+1
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dd $1.0p-1
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dd $0.0
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dd $1.23456789
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dd $0.123456789
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dd $0.0000123456789
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dd $1.23456789p10
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dd $1.23456789p+10
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dd $1.23456789p-10
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dd $0.123456789p10
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dd $0.123456789p+10
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dd $0.123456789abcdef0123456789abcdef012345p-10
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dd $0.0000123456789
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dd $0.0000123456789p+10
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dd $0.0000123456789p-10
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dd $123456789.0
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dd $0000123456789.0
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dd $123456789.0p+0
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dd $123456789.0p+64
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dd $1.0p-150 ; Underflow
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dd $1.0p-149 ; Smallest denorm
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dd $1.ffffffffffffffffffffffffffffp-128 ; Rounds to denorm
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dd $1.0p-127 ; Denorm
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dd $1.ffffffffffffffffffffffffffffp-127 ; Rounds to normal
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dd $1.0p-126 ; Smallest non-denorm
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dd $1.0p+127 ; Biggest possible exponent
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dd $1.ffffffffffffffffffffffffffffp+127 ; Rounds to infinity
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dd Inf ; Infinity
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dd NaN
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; 64-bit
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dq 1.0
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dq $1.0
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dq 2.0
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dq $2.0
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dq $1.0p+1
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dq $1.0p-1
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dq $0.0
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dq $1.23456789
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dq $0.123456789
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dq $0.0000123456789
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dq $1.23456789p10
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dq $1.23456789p+10
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dq $1.23456789p-10
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dq $0.123456789p10
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dq $0.123456789p+10
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dq $0.123456789abcdef0123456789abcdef012345p-10
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dq $0.0000123456789
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dq $0.0000123456789p+10
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dq $0.0000123456789p-10
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dq $123456789.0
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dq $0000123456789.0
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dq $123456789.0p+0
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dq $123456789.0p+300
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dq $1.0p-1075 ; Underflow
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dq $1.0p-1074 ; Smallest denorm
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dq $1.ffffffffffffffffffffffffffffp-1024 ; Rounds to denorm
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dq $1.0p-1023 ; Denorm
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dq $1.ffffffffffffffffffffffffffffp-1023 ; Rounds to normal
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dq $1.0p-1022 ; Smallest non-denorm
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dq $1.0p+1023 ; Biggest possible exponent
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dq $1.ffffffffffffffffffffffffffffp+1023 ; Rounds to infinity
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dq Inf ; Infinity
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dq NaN
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; 80-bit
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dt 1.0
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dt $1.0
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dt 2.0
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dt $2.0
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dt $1.0p+1
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dt $1.0p-1
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dt $0.0
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dt $1.23456789
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dt $0.123456789
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dt $0.0000123456789
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dt $1.23456789p10
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dt $1.23456789p+10
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dt $1.23456789p-10
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dt $0.123456789p10
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dt $0.123456789p+10
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dt $0.123456789abcdef0123456789abcdef012345p-10
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dt $0.0000123456789
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dt $0.0000123456789p+10
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dt $0.0000123456789p-10
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dt $123456789.0
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dt $0000123456789.0
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dt $123456789.0p+0
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dt $123456789.0p+1024
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dt $1.0p-16446 ; Underflow
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dt $1.0p-16445 ; Smallest denorm
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dt $1.ffffffffffffffffffffffffffffp-16384 ; Rounds to denorm
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dt $1.0p-16383 ; Denorm
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dt $1.ffffffffffffffffffffffffffffp-16383 ; Rounds to normal
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dt $1.0p-16382 ; Smallest non-denorm
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dt $1.0p+16383 ; Biggest possible exponent
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dt $1.ffffffffffffffffffffffffffffp+16383 ; Rounds to infinity
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dt Inf ; Infinity
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dt NaN
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; 128-bit
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do 1.0
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do $1.0
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do 2.0
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do $2.0
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do $1.0p+1
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do $1.0p-1
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do $0.0
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do $1.23456789
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do $0.123456789
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do $0.0000123456789
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do $1.23456789p10
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do $1.23456789p+10
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do $1.23456789p-10
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do $0.123456789p10
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do $0.123456789p+10
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do $0.123456789abcdef0123456789abcdef012345p-10
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do $0.0000123456789
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do $0.0000123456789p+10
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do $0.0000123456789p-10
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do $123456789.0
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do $0000123456789.0
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do $123456789.0p+0
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do $123456789.0p+1024
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do $1.0p-16495 ; Underflow
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do $1.0p-16494 ; Smallest denorm
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do $1.ffffffffffffffffffffffffffffffffp-16384 ; Rounds to denorm
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do $1.0p-16383 ; Denorm
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do $1.ffffffffffffffffffffffffffffffffp-16383 ; Rounds to normal
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do $1.0p-16382 ; Smallest non-denorm
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do $1.0p+16383 ; Biggest possible exponent
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do $1.ffffffffffffffffffffffffffffffffp+16383 ; Rounds to infinity
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do Inf ; Infinity
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do NaN
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