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softfloat: Remove float_muladd_halve_result

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All uses have been convered to float*_muladd_scalbn.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-07 18:06:30 -06:00
parent 88d5f550bd
commit 6a243913aa
3 changed files with 0 additions and 13 deletions
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4
fpu/softfloat-parts.c.inc
View file

@ -653,10 +653,6 @@ static FloatPartsN *partsN(muladd_scalbn)(FloatPartsN *a, FloatPartsN *b,
a->exp = p_widen.exp; a->exp = p_widen.exp;
return_normal: return_normal:
/* TODO: Replace all use of float_muladd_halve_result with scale. */
if (flags & float_muladd_halve_result) {
a->exp -= 1;
}
a->exp += scale; a->exp += scale;
finish_sign: finish_sign:
if (flags & float_muladd_negate_result) { if (flags & float_muladd_negate_result) {

6
fpu/softfloat.c
View file

@ -2274,9 +2274,6 @@ float32_muladd(float32 xa, float32 xb, float32 xc, int flags, float_status *s)
if (unlikely(!can_use_fpu(s))) { if (unlikely(!can_use_fpu(s))) {
goto soft; goto soft;
} }
if (unlikely(flags & float_muladd_halve_result)) {
goto soft;
}
float32_input_flush3(&ua.s, &ub.s, &uc.s, s); float32_input_flush3(&ua.s, &ub.s, &uc.s, s);
if (unlikely(!f32_is_zon3(ua, ub, uc))) { if (unlikely(!f32_is_zon3(ua, ub, uc))) {
@ -2345,9 +2342,6 @@ float64_muladd(float64 xa, float64 xb, float64 xc, int flags, float_status *s)
if (unlikely(!can_use_fpu(s))) { if (unlikely(!can_use_fpu(s))) {
goto soft; goto soft;
} }
if (unlikely(flags & float_muladd_halve_result)) {
goto soft;
}
float64_input_flush3(&ua.s, &ub.s, &uc.s, s); float64_input_flush3(&ua.s, &ub.s, &uc.s, s);
if (unlikely(!f64_is_zon3(ua, ub, uc))) { if (unlikely(!f64_is_zon3(ua, ub, uc))) {

3
include/fpu/softfloat.h
View file

@ -120,14 +120,11 @@ bfloat16 bfloat16_squash_input_denormal(bfloat16 a, float_status *status);
| Using these differs from negating an input or output before calling | Using these differs from negating an input or output before calling
| the muladd function in that this means that a NaN doesn't have its | the muladd function in that this means that a NaN doesn't have its
| sign bit inverted before it is propagated. | sign bit inverted before it is propagated.
| We also support halving the result before rounding, as a special
| case to support the ARM fused-sqrt-step instruction FRSQRTS.
*----------------------------------------------------------------------------*/ *----------------------------------------------------------------------------*/
enum { enum {
float_muladd_negate_c = 1, float_muladd_negate_c = 1,
float_muladd_negate_product = 2, float_muladd_negate_product = 2,
float_muladd_negate_result = 4, float_muladd_negate_result = 4,
float_muladd_halve_result = 8,
}; };
/*---------------------------------------------------------------------------- /*----------------------------------------------------------------------------